1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * dwarf-regs.c : Mapping of DWARF debug regis 3 * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
4 * 4 *
5 * Written by: Masami Hiramatsu <mhiramat@kern 5 * Written by: Masami Hiramatsu <mhiramat@kernel.org>
6 */ 6 */
7 7
8 #include <stdlib.h> <<
9 #include <string.h> <<
10 #include <debug.h> 8 #include <debug.h>
11 #include <dwarf-regs.h> 9 #include <dwarf-regs.h>
12 #include <elf.h> 10 #include <elf.h>
13 #include <errno.h> <<
14 #include <linux/kernel.h> 11 #include <linux/kernel.h>
15 12
16 #ifndef EM_AARCH64 13 #ifndef EM_AARCH64
17 #define EM_AARCH64 183 /* ARM 64 bit */ 14 #define EM_AARCH64 183 /* ARM 64 bit */
18 #endif 15 #endif
19 16
20 #ifndef EM_LOONGARCH 17 #ifndef EM_LOONGARCH
21 #define EM_LOONGARCH 258 /* LoongArch */ 18 #define EM_LOONGARCH 258 /* LoongArch */
22 #endif 19 #endif
23 20
24 /* Define const char * {arch}_register_tbl[] * 21 /* Define const char * {arch}_register_tbl[] */
25 #define DEFINE_DWARF_REGSTR_TABLE 22 #define DEFINE_DWARF_REGSTR_TABLE
26 #include "../arch/x86/include/dwarf-regs-table 23 #include "../arch/x86/include/dwarf-regs-table.h"
27 #include "../arch/arm/include/dwarf-regs-table 24 #include "../arch/arm/include/dwarf-regs-table.h"
28 #include "../arch/arm64/include/dwarf-regs-tab 25 #include "../arch/arm64/include/dwarf-regs-table.h"
29 #include "../arch/sh/include/dwarf-regs-table. 26 #include "../arch/sh/include/dwarf-regs-table.h"
30 #include "../arch/powerpc/include/dwarf-regs-t 27 #include "../arch/powerpc/include/dwarf-regs-table.h"
31 #include "../arch/s390/include/dwarf-regs-tabl 28 #include "../arch/s390/include/dwarf-regs-table.h"
32 #include "../arch/sparc/include/dwarf-regs-tab 29 #include "../arch/sparc/include/dwarf-regs-table.h"
33 #include "../arch/xtensa/include/dwarf-regs-ta 30 #include "../arch/xtensa/include/dwarf-regs-table.h"
34 #include "../arch/mips/include/dwarf-regs-tabl 31 #include "../arch/mips/include/dwarf-regs-table.h"
35 #include "../arch/loongarch/include/dwarf-regs 32 #include "../arch/loongarch/include/dwarf-regs-table.h"
36 33
37 #define __get_dwarf_regstr(tbl, n) (((n) < ARR 34 #define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
38 35
39 /* Return architecture dependent register stri 36 /* Return architecture dependent register string (for kprobe-tracer) */
40 const char *get_dwarf_regstr(unsigned int n, u 37 const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
41 { 38 {
42 switch (machine) { 39 switch (machine) {
43 case EM_NONE: /* Generic arch - use 40 case EM_NONE: /* Generic arch - use host arch */
44 return get_arch_regstr(n); 41 return get_arch_regstr(n);
45 case EM_386: 42 case EM_386:
46 return __get_dwarf_regstr(x86_ 43 return __get_dwarf_regstr(x86_32_regstr_tbl, n);
47 case EM_X86_64: 44 case EM_X86_64:
48 return __get_dwarf_regstr(x86_ 45 return __get_dwarf_regstr(x86_64_regstr_tbl, n);
49 case EM_ARM: 46 case EM_ARM:
50 return __get_dwarf_regstr(arm_ 47 return __get_dwarf_regstr(arm_regstr_tbl, n);
51 case EM_AARCH64: 48 case EM_AARCH64:
52 return __get_dwarf_regstr(aarc 49 return __get_dwarf_regstr(aarch64_regstr_tbl, n);
53 case EM_SH: 50 case EM_SH:
54 return __get_dwarf_regstr(sh_r 51 return __get_dwarf_regstr(sh_regstr_tbl, n);
55 case EM_S390: 52 case EM_S390:
56 return __get_dwarf_regstr(s390 53 return __get_dwarf_regstr(s390_regstr_tbl, n);
57 case EM_PPC: 54 case EM_PPC:
58 case EM_PPC64: 55 case EM_PPC64:
59 return __get_dwarf_regstr(powe 56 return __get_dwarf_regstr(powerpc_regstr_tbl, n);
60 case EM_SPARC: 57 case EM_SPARC:
61 case EM_SPARCV9: 58 case EM_SPARCV9:
62 return __get_dwarf_regstr(spar 59 return __get_dwarf_regstr(sparc_regstr_tbl, n);
63 case EM_XTENSA: 60 case EM_XTENSA:
64 return __get_dwarf_regstr(xten 61 return __get_dwarf_regstr(xtensa_regstr_tbl, n);
65 case EM_MIPS: 62 case EM_MIPS:
66 return __get_dwarf_regstr(mips 63 return __get_dwarf_regstr(mips_regstr_tbl, n);
67 case EM_LOONGARCH: 64 case EM_LOONGARCH:
68 return __get_dwarf_regstr(loon 65 return __get_dwarf_regstr(loongarch_regstr_tbl, n);
69 default: 66 default:
70 pr_err("ELF MACHINE %x is not 67 pr_err("ELF MACHINE %x is not supported.\n", machine);
71 } 68 }
72 return NULL; 69 return NULL;
73 } <<
74 <<
75 __weak int get_arch_regnum(const char *name __ <<
76 { <<
77 return -ENOTSUP; <<
78 } <<
79 <<
80 /* Return DWARF register number from architect <<
81 int get_dwarf_regnum(const char *name, unsigne <<
82 { <<
83 char *regname = strdup(name); <<
84 int reg = -1; <<
85 char *p; <<
86 <<
87 if (regname == NULL) <<
88 return -EINVAL; <<
89 <<
90 /* For convenience, remove trailing ch <<
91 p = strpbrk(regname, " ,)"); <<
92 if (p) <<
93 *p = '\0'; <<
94 <<
95 switch (machine) { <<
96 case EM_NONE: /* Generic arch - use <<
97 reg = get_arch_regnum(regname) <<
98 break; <<
99 default: <<
100 pr_err("ELF MACHINE %x is not <<
101 } <<
102 free(regname); <<
103 return reg; <<
104 } 70 }
105 71
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